some spectroscopic information on this object from [vsnet-alert 15832] confirming the features seen here

Robin

We conducted Echelle observations of PNV Aql on June 3 during 2.5 hours with the 2.1m telescopeat the San Pedro M=E1rtir Observatory.We detected a strong double-peaked H alfa line in emission, while H Beta shows abroad and shallow abosrption with a weak core in emission. H Gamma and Delta are almost absent.He I 4471 shows a weak absorption.

Radial velocities of H alfa shows a clear orbital period of P(orb) 0.06164 days. The semi amplitude of theradial velocity curve is only K = 15 km/s, which for a highinclination system (as presumed by the double peak H alfa line)suggests a very low mass companion, possibly a brown dwarf. If this proves correct we should be ableto observe the Balmer lines of the white dwarf when it returns to quiescence.

The aspect of the spectrum evolve. The Halphais faintly visible the 12/6 and not visible in emission the 13/6.(exposure time is relativement short for the two obervation, 4x600 sec.on a 0.2-m télescope).